Sindbad~EG File Manager

<?php
/**
 * Admin Chat List API
 * Returns list of all chat conversations for admin
 */

require_once '../config/config.php';

header('Content-Type: application/json');

// Check if user is logged in and has admin access
if (!isLoggedIn()) {
    echo json_encode(['success' => false, 'message' => 'Unauthorized']);
    exit;
}

$userAccessLevel = $_SESSION['access_level'] ?? '';
if (!in_array($userAccessLevel, ['superuser', 'admin', 'regional_admin', 'district_admin'])) {
    echo json_encode(['success' => false, 'message' => 'Access denied']);
    exit;
}

try {
    $db = Database::getInstance()->getConnection();
    
    // Get all conversations with last message and unread count
    $sql = "
        SELECT 
            c.id,
            c.visitor_name as name,
            c.visitor_email,
            c.created_at,
            c.updated_at,
            (SELECT COUNT(*) FROM chat_messages 
             WHERE conversation_id = c.id 
             AND sender_type != 'admin' 
             AND is_read = 0) as unread_count,
            (SELECT message_text FROM chat_messages 
             WHERE conversation_id = c.id 
             ORDER BY created_at DESC LIMIT 1) as last_message,
            (SELECT created_at FROM chat_messages 
             WHERE conversation_id = c.id 
             ORDER BY created_at DESC LIMIT 1) as last_message_time,
            (SELECT sender_type FROM chat_messages 
             WHERE conversation_id = c.id 
             ORDER BY created_at DESC LIMIT 1) as last_sender_type
        FROM conversations c
        ORDER BY 
            (SELECT MAX(created_at) FROM chat_messages WHERE conversation_id = c.id) DESC,
            c.updated_at DESC
        LIMIT 100
    ";
    
    $stmt = $db->query($sql);
    $conversations = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    // Format the data
    $formatted = array_map(function($conv) {
        return [
            'id' => (int)$conv['id'],
            'name' => $conv['name'] ?: 'Anonymous',
            'email' => $conv['visitor_email'],
            'type' => 'Member',
            'unread_count' => (int)$conv['unread_count'],
            'last_message' => $conv['last_message'],
            'last_message_time' => $conv['last_message_time'] ?: $conv['created_at'],
            'last_sender_type' => $conv['last_sender_type'],
            'created_at' => $conv['created_at']
        ];
    }, $conversations);
    
    echo json_encode([
        'success' => true,
        'conversations' => $formatted,
        'total' => count($formatted)
    ]);
    
} catch (Exception $e) {
    error_log("Admin chat list error: " . $e->getMessage());
    echo json_encode([
        'success' => false,
        'message' => 'Failed to load conversations'
    ]);
}